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<?php /** *求两个已知经纬度之间的距离,单位为米 *@param lng1,lng2 经度 *@param lat1,lat2 纬度 *@return float 距离，单位米 *@author www.phpernote.com **/ function getdistance($lng1,$lat1,$lng2,$lat2){ //将角度转为狐度 $radLat1=deg2rad($lat1);//deg2rad()函数将角度转换为弧度 $radLat2=deg2rad($lat2); $radLng1=deg2rad($lng1); $radLng2=deg2rad($lng2); $a=$radLat1-$radLat2; $b=$radLng1-$radLng2; $s=2*asin(sqrt(pow(sin($a/2),2)+cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)))*6378.137*1000; return $s; } echo getdistance(31.2014966,121.40233369999998,31.22323799999999,121.44552099999998); function calculateSignDistance($longitude1, $latitude1, $longitude2, $latitude2) { $lat1 = ($latitude1 * pi() ) / 180; $lng1 = ($longitude1 * pi() ) / 180; $lat2 = ($longitude2 * pi() ) / 180; $lng2 = ($latitude2 * pi() ) / 180; $calcLongitude = $lng2 - $lng1; $calcLatitude = $lat2 - $lat1; $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2); $stepTwo = 2 * asin(sqrt($stepOne)); return 6378.137*1000 * $stepTwo; } echo "\n"; echo calculateSignDistance(31.2014966,121.40233369999998,31.22323799999999,121.44552099999998); /** *求两个已知经纬度之间的距离,单位为千米 *@param lng1,lng2 经度 *@param lat1,lat2 纬度 *@return float 距离，单位千米 **/ function distance($lng1,$lat1,$lng2,$lat2)//根据经纬度计算距离 { //将角度转为弧度 $radLat1=deg2rad($lat1); $radLat2=deg2rad($lat2); $radLng1=deg2rad($lng1); $radLng2=deg2rad($lng2); $a=$radLat1-$radLat2;//两纬度之差,纬度<90 $b=$radLng1-$radLng2;//两经度之差纬度<180 $s=2*asin(sqrt(pow(sin($a/2),2)+cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)))*6378.137*1000; return $s; } echo "\n"; echo distance(31.2014966,121.40233369999998,31.22323799999999,121.44552099999998); /** * @desc 根据两点间的经纬度计算距离 * @param float $lat 纬度值 * @param float $lng 经度值 */ function getDistance3($lat1, $lng1, $lat2, $lng2) { $earthRadius = 6378137; //approximate radius of earth in meters /* Convert these degrees to radians to work with the formula */ $lat1 = ($lat1 * pi() ) / 180; $lng1 = ($lng1 * pi() ) / 180; $lat2 = ($lat2 * pi() ) / 180; $lng2 = ($lng2 * pi() ) / 180; /* Using the Haversine formula http://en.wikipedia.org/wiki/Haversine_formula calculate the distance */ $calcLongitude = $lng1-$lng2 ; $calcLatitude = $lat1-$lat2 ; $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2); $stepTwo = 2 * asin(sqrt($stepOne)); $calculatedDistance = $earthRadius * $stepTwo; return $calculatedDistance; } echo "\n"; echo getDistance3(31.2014966,121.40233369999998,31.22323799999999,121.44552099999998);

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